This section covers the following topics:

• The ability of Office Communications Server 2007 R2 clients to coexist and interact with each other, and with earlier client versions.
  
  
• Office Communicator 2007 R2 compatibility with different versions of Office Communicator, Office, Exchange Server, Windows, and selected public instant messaging (IM) clients.
  
  
• Office Communicator 2007 R2 integration with Microsoft Office and Microsoft Exchange Server: how it works, and how to troubleshoot common integration issues.
  
  

This section includes the following topics:

• Client Compatibility
  
  
• Communicator 2007 R2 Integration